I agree. This is mostly the task for forum administrators to manage tags themselves, and their assignment to topics.
I also thought about some kind of a scheme to suggest to help assign meaningful tags, but could not think of one that would be concise and comprehensive at the same time. This would require more thought, and maybe we should just build it as we go. Maybe a good place to start is to establish some kind of hierarchy of the existing tags, but I did’t put too much thought into that.